Weatherproof coating medium



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COATING R PLASTIC 8 latented Mar. 18, 1924.

Examiner RUDOLF PLONNIS, OF WILIERSDOBF, NEAR BERLIN, GERIANY.

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T 0 all whom it may concern:

Be it known that I, RUDOLF Pnomus, a citizen of the Free State ofPrusia, in the German Republic, residing at \Vilmersdorf,

near Berlin, in the Free State of Prussia, Germany, have inventedImprovements in Weather roof Coating Mediums; and I do hereby eclare thefollowing to be a full, clear, and exact description of the same.

My invention relates to weather proof coating media adapted for use as acement for card board and the like and as a lining for floors or wallsand the process of making the same, and the object of the invention isto provide a composition which can be used as a coating for any matterand more particularly for wood, iron, and other metals, and for coatingsof cement or other mortar or clay. Another object f the invention is toprovide a composition from which fire proof card board or coatings forfloors or walls can be made. With these objects in view 111 inventionconsists in the features to be escribed hereinafter and particularlypointed out in the appended claims.

In the practice of my invention I mix otassium watergla with a certainamount of otassmm hydroxid I? (caustic tash lye: and add to t e m1 recalcium car'- nate, chalk or similar matter such as ma fies T Themixture remains for a long nne E551 fluid, so that it may be read on aform ation. In some cases I a d oolorin as matter such as mineral coloror filling me a to the solution.

My im roved solutions are especially applicable or use as paint whichcan be spread on foundations of any character, and which 40 as comparedwith paint now in use is highly weatherproof and is in a less de asaffected by heat and li uids such as aci s.

In the manu acture of my improved paint I add for example to potassiumwater. las of thetrade from 2 tcT5 per cent of a 0 potash lyelhydroxidof otassium lye) and or more of washedc Elk In a modification oft'lie'prooess I add tar oil to the solution of tassium water to glass,potash lye and cha whereby the solution is materially chan according tothe amount of tar oil add thereto. The solution adheres more firmly tothe foundation, it is less brittlemd it provides a bait-Mtercoatingasaga rusting than e original compodtion. I have found thatin Application filed November 3, 1920. Serial Ho. 421,627.

r 7 most cases an addition of from 2 to 10% is sufiicient.

Among the tar oils those of etrole urn jgt-roleuxn driving oil) impartto t e solutions certam' sirab e properties wherefore they are preferredfor many purposes as compared to other tar oils such as coal tar gjls.

A desirable property of the petroleum tar 6 oil is that it may be mixedmore thoroughly with the said solution of potassium water glass, potashlye, chalk, and the like, and that the color of the com osition is lightand bright. Therefore] prefer to add petroleum tar oil in such cases inwhich the color of the composition is of importance apart from theproperty as an anti-rusting medium, as is the case for example inoptical signals.

In addition the coating made from the solution is nearly odorles, asdistinguished from compositions made with other tar oils, which propertyis important for indoor: painting as well as for coatings of publicvehicles and public buildings.

In most cases an addition of from 2 to 5% of petroleum tar oil to thesolution has proved suflicient, though in some cases I prefer a higherratio. 85

In the 'manufacture of fire roof and insulating bodies such as veneer,abric, card boards, etc., I coat sheets of pa r or thin card board withone of the a oresaid solutions or mixtures, and I place the said 90sheets one :(pon the other before the coat: in has dri so that a body ofthe desired thickness is obtained, and I bind the sheets together ormould the same b pressure. Thereafter the body is dried. n a similar wayI proceed in case of fabric, veneer, or the like.

A card board which has thus been produced canvbe washed, it is veryhard, and it resists high temperatures a longer time than asbestos boardimpregnated with water glass, because it is a poor conductor of heat.

- A further modification of the process consists in adding to a solutionof potash lye, potassium water glass and chalk, saw dust, powdered sand,and similar ma r, andinsomecasesdestufis. Imixallof the said substances,and sprea' d the same on a suitable foundation such as wood, iron,stone, clay, mortar, etc. Thereby I obtain a coating which has theafore-mentioned valuable propcties.

The coating may also be made by spreading on the foundation a mixture ofpotassium water glass, potash lye, and chalk, and thereafter spreadingthereon saw dust, cork meal. powdered peat, sand, and the like, and)ressin the same on the coating. Preferably the method is repeated untilthe coat-- ing has the desired thickness, which method is preferablebecause the coating dries more rapidly. The coating is perfect fireproof, it is a good insulator as against heat, and when applied to metalfor example iron, it prevents oxidation.

I claim:

1. The herein described composition of matter which comprises potassiumwater glass, caustic alkali and calcium carbonate, and which is adaptedfor use as a paint or coating for floors and walls.

2. The herein described composition of matter which comprises potassiumwater glass, caustic alkali, a fillin medium and tar oil, and which isadapted or use as a paint or coating for floors and walls.

3. The herein described composition of matter which comprises potassiumwater glass, caustic alkali, calcium carbonate and tar oil, and which isadapted for use as a. paint or coating for floors and walls.

4. The herein described composition of matter which comprises 100 artsby weight of potassium water glass. a mut 3 parts of caustic alkali andabout 5 parts of calcium carbonate, and which is adapted for use as apaint or coating for floors and walls.

5. The herein described composition of matter which comprises 100 partsby weight of potassium water glass. about 3 parts of caustic alkali.about .3 parts of calcium carbonate, and about 5 parts of tar oil, andwhich is adapted for use as a paint or coating for floors and walls.

In testimony whereof I hereunto afiix my signature in the presenceof-two witnesses.

DR. RFDOLF PLGNNIS.

\Vitnesses:

Dr. ERNEST Mfiiilisxnour, MARIA Hocmuzuruu.

